ram doesnt care what kind of cpu it is...the board is another matter... 680i based boards only support 45nm dual cores. since you didnt list which cpu you have, i can only assume it is a 45nm dual core. now the other thing is are you running the ram synced? if synced which ratio? if you are running synced, unsync the ram from the fsb/ratio. as the nv680 allowes unlinking of ram speed from the other buss speed.